Metal-bending machine



H. FUCHS METAL SENDING MACHINE May 24,1921. 1,630,064

Filed Feb.l. 1924 s Shoots-Shoot 1 I /z V W J! I l 1 Iw 44 l I INVENTOR. 44 i #062 fut/1S 47 ATTORNEYS May 24, 1927.

H, FUCHS I METAL B ENDING MAdHINE Filed Feb. 1. 1924 3 Shoots-Sheet ATTORNEYS 1,630,064 H. FUCHS METAL BENDING MACHINE Filed Feb. 1', 1924 s Shoots- Shoat 3 IIIIIHIII Patented May 24, 1927.

UNITED "STATES PATENT ()FFICE.

HUGO Focus, on NEW YORK, 1v. Y., nssrenon or ONE-HALE TOCHAUNGEY M.

\SINCERBEAUX, or JACKSON Heroines, new YORK.

METAL-BENDING MACHINE.

Application filed February 1, 1924. Serial No. 689,881.

Such devices have, however. been of a slowacting type and have been otherwise unsuited to produce hook or eye members as a, complete special product in themselves and at a satisfactorily high speed of" production.

The principal objects of the present invention are to improve the construction and mode of operation of metal bending ma chines of the class above described, a nd'to produce a machine which will operate to form hook bolts or eye bolts in a novel and improved manner, and which is capable ot a much higher rate of productionthan machines heretofore produced. I

WVit-h these objects in View, the invention consists in a machine having the noveland improved features, constructions and combination of parts hereinafter described and particularly pointed out in the claimsythe advantages ofwhich will be readil understood and appreciated. by those s illed 111 the art.

The invention will be clearly understood from the accompanying drawings, illustrat Fig. 3 is a view in vertical section taken along the line 3-3 in Fig. 2. n

Fig. 4- is a detail view in vertical section of a rotatable forming plate. the section being taken substantially on the line 44 of Fig. 1. I

Fig. 51s a sectional detail along the line 55 in Figure 6 ofa portion of the forming plate and certain associatedparts.

Fig. 6 is a plan view of the rotatable forming plate Fi 7 a detail plan. View along line 7-7 in Figure 5 of a stop controlling cam member; and i Fig. Sis a View in side elevation of an eye member such as may be formed by the device illustrated.

The machine embodying the invention in its preterred form, as illustrated in the drawings, comprises a vertically 1*8C1PIOC21'E- ing head member 10 and a stationary bed The plate 11 on which the workis held. head member 10 of the machine may be mounted to slide vertically on suitable guides and may be driven through suitable connections from suitable source of power.

Projecting downwardlyfrom the reciprocating head 10 and preferably seated therein by means of a screw-threaded connection 12 is a worm nut 13 having a series of internal threads of relatively deep pitch into which is threaded a. worm member 14. The worm member 14 is supported upon the worm nut 13 by mechanismv comprising. a ring 39 loosely mounted upon the worm nut and arranged to engage a flange 40 on the nut to limit the downward movement of the ring with relation to the worm nut. To the ring bymeans of a flange at the lower end of the worm and apcollar 43- secured to the worm between which elements the ring 42 is engaged. The worm 14 is normally held in.

its limiting lowermost position with relation to the worm nut 13 by means of acoiled spring 44. 1

i The mechanism for bending the stock comprises the rotatable bending or forming plate 15 mounted on the bed plate 11 below the worm member 14. Whenthe reciproeating head 10 is in its uppermost position, the lower end of the worm 14 is spaced from the forming plate 15 a distance suflicient to permit the insertion of a section of stock between the worm member and the forming plate, Then the, head 10 is moved downwardly, the worm member 14 is carried downwardly until an element at the lower end thereof engages a stop carried by the forming plate. When the downward movement of the worm member 14 isthus arrest a toothed jaw or gripping member 17 selit) cured thereto which is adapted to grip the work 18 and draw it through an arcuate path as the plate is revolved. The toothed jaw member 17 is provided with an opening 19 in'vertical alinement with a similar opening 20 extending through the forming plate 15. The alined openings 19 and 20 are adapted to receive a downwardly extending pin 21 projecting from the lower end of the worm member 11. The pin 21 extends into the opening 19 in even' the elevated position of'the worm member so that the worm member and the forming plate rotate together and at all times occupy like angular positions.

The lower end of the worm member 14 is seat 2a in the forming plate. The abutment,

of the pin against the lower face of the recess in the seat 24; checks further descent of the worm and further downward movement of the head causes the worm to rotate as above described, andthrough the engagement of the driving pin 21 with the jaw 17 causes corresponding rotation of the forming plate. In the rotation of the forming plate the bar or rod 18 forming the stock is drawn and bent about the center pin 22 thereby to form the desired hook or eye at the end of the bar. The extent of downwardmovement of the head and worm before rotation of the plate begins may be altered by substituting a seat member 24 of different depth.

.As the forming operation is completeda cutoff actuating stud 25 carried by the head 10 engages a strike-plate 26 carried by a vertically movable cut-oft blade 27 through which and a fixed blade 28 the stock 18 extends. The blade 27 is mounted in a vertical guideway formed by guide plates 28 in which it is held by the cover plates 29. Suitable springs 30 hold the blade in its normal elevated position and antifriction rollers81 at the opposite ends of the blade member engaging the guideplates 28 facili-. tate its operation. The cutting blades are provided with hardened annular cutting. members 82 throughthe ahned openings 33 of which the work is inserted.

In order to limit the length of the section of stocksupplied to the forming plate for an operation a stop pin 35 shown in Fig. l is mounted in the forming plate 15 in position to be engaged by the end of the stock 18 as the stock is extended through the openings 33 into position to be operated upon as shown in dot and dash lines in Fig. 2. .In order to prevent interference of the stop member with the operation of the device,

provision is made for \vitl'idrawal of the stop pin from its projecting position when rotation of the forming plate. begins. To bring this about the stop pin 35 is mounted for vertical movement in the forming plate. and is acted upon by a spring 30 tending to movev the stop pin downwardly against a cam surface 37 formed on the upper side of a stationary bushing member 38. ,dllSllillfI 38 is clamped to the bed plate 11 preferably by a shoulder on the tubular member -16 which is secured in place by the nuts -17 as shown in Fig. 1. Pin35 normally rests on the high portion of cam surface 37 so as to project above the face of plate 15 to stop the end of the stock. As the plate 15 l'iegins to rotate, the pin 35 rides down the inclined cam surface 37 and is at once withdrauui so as not to interfere with the bending operation.

In order to determine the extent of the bending, that is, the degree of opening of the hook or its complete closure to form an eye, the supports 41 are provided with turnbnckles which enable the supports to be adjusted in length to adjustthe ring 3!) toward and from the ring +12. It will be seen that adjusting the vertical position of the ring 39 with relation to the ring -12 adjusts the length of travel of the worm nut longitudinally of the worm and thereby determines the extent of rotation of the worm and the forming plate. The length. of the cut-off actuating stud 25 may also be varied to control the time of the severing operation which may occur at any desired point in the cycle, either before or after the hook is completely formed.

In order to guide the stock as it is fed to the machine, two rolls 45 are mounted on the bed plate in advance of the cutting-oil mechanism and arranged to receive the stock between them, as shown clearly in Fig. 2. A third guide roll 34: is mounted on a block secured to the bed plate so as to engage the stock between the cutting-0H mechanism and the bending devices to assist in locating the stock.

In the ope 'ation of the machine the reciprocating head 10 may be operated continuously or intermittently, and the. operating mechanism therefor may be under control of the operator if desired. er'ation of the machine, starting with the head 10 in its elevated position, a section of bar stock is inserted by the operator between In the 0 llfi the rolls 15, through the cutting members 32,and.along the guideroll 34: and the grip-- ping jaw 17, until it engages the stop 35. lVith the stock in this position, upon the downward movement of the head 10 the through the engagement of the pin 21 in the opening 20 in the forming plate the forming plate is rotated thereby bending the stock about the pin 22. Duringthe latter part of the downward movement of the head, the lower end of the stud 25 engages the plate 26, thereby actuating the cut-off plate 27 to sever the stock; During the rotation of the forming plate, the stop pin 35 moved down wardly out of operating position, so that it I does not interfere with the bending operation.

As the head 10 moves upwardly, the \VO111114; is held in its lowermost position by the coiledspring 14 until the ringv 39 engages the flange 40, the worm nut 13 then moving upwardly independently of the worm. During this movement of the nut, the worm is rotated back to its initial position, thereby rotating the forming plate back to its starting position. As the forming plate is 1'0- tated to starting position, the stop pin 35 is projected upwardly into operative position by the cam 37. During the last part of the upward movement of the head, the worm 14; is lifted away from the forming plate to a posit-ion shown in Fig. 1. The parts are thus restored to position to receive another section of stock between the WOI'Il'l and forming plate.

Having explained the nature and object of this invention and having specifically de scribed a machine embodying the invention in itspreferred form, what is claimed is- 1. In a metal bending device, a rotatable member for holding and bending the work, a worm nut movable toward and from the rotatable member along the axis of rotation thereof, and a worm member separate from the rotatable member and adapted to engage therewith and to be rotated by the movement of the worm nut toward the rotatable member.

2. In a hook forming device, a rotatable member for holding and bending an end sectionot' a rod, a worm nut movable toward and from the rotatable member along the axis of rotation thereof, a worm carried by the worm nut and adapted to be brought into engagement with the rotatable member and to then be rotated by the further travel of the Worm nut, means for causing the rotatable member to rotate with the worm, cut-oil" means -tor the work, and means traveling with the worm nut for actuating the cut-off means as the rotatable member completes its forming operation.

3. In a hook forming device, a rotatable, forming plate, means on the plate for grippin the work, a worm nut movable toward and from the plate along the axis of rotation thereof, a worm member carried by the worm nut and normally spaced from the forming plate, said worm member being brought into rotatable engagement with the plate by the movement of the worm nut toward the plate, and means for varying the extent of rotation of the worm produced by the worm nut.

l. In a hook forming device, a rotatable forming plate, a'cut-otl' device having alined OPfllllIlQjS through which stock is passed to aposition having an end disposed on the face of the plate, means on the plate for gripping the work, a worm nut movable toward and from the plate along the axis of rotation thereofm worm member carried by the worm nut and normally spaced from the forming plate, aid wormniember being brought into rotatable engagement with the plate by the movement of the worm nut toward the plate, means for varying the extent of rotation of the worm, and 'means traveling with the worm nut for actuating the cut-oii' device as the plate completes its forming movement.

5. In a hook forming device, a rotatable forming plate, a movable stop device projecting from the face of the plate, guide means whereby a rod may be directed across the face of the plate into engagement with the stop, work gripping means carried by the plate and spaced from the center thereof, a worm nut movable toward and from the plate along the axis of rotation thereof, a worm carried by the worm nut and having a centrally disposed pin extending toward the plate, said plate being provided with a recess to receive the ,pin, means for causing the plate to rotate with the worm when further axial movement of the work is checked by engagement of the pin with the plate Whereby the end rod section is bent about the pin by the gripping means, and means for withdrawing the stop deviceduring the rotation of the plate. l

6. In a hook forming device, a rotatable. forming plate, means on the face of the plate for gripping a rod section, a reciprocating head movable toward and from the face of the plate, means carried by the head for engaging and rotating the plate as thev head moves toward the plate, cut-off means through which the work is passed to the forming plate, and means carried by the head for actuating the cut-off means.

7. In a hook forming device, a rotatable forming plate, means on the face of the plate for gripping a rod end section, a reciprocating head movable toward and from the face of the plate, screw means carried by the head for engaging the plate and rotating the same under the movement of the head toward the plate whereby to bend the rod sect-ion. cut-oil means through which the work extends to the plate, and means carried by the head for engaging and operating the cut-ott' means.

8. In a hook forming device, a rotatable forming plate, means on the face of the plate for gripping a rod end section, a reciprocating head movable toward and from the face of the plate, a worm nut carried by the head, a worm member carried by the nut and adapted to be brought into rotative engagement with the plate by the advancing movement of the head to thereby bend the rod section, spring means for maintaining the worm member in engagement with the plate during the receding movement of the head to thereby reverse the rotation of the head, and adjustable stop means carried by the worm and engaged by the not near the end of the receding movement to withdraw the worm from the rotatable forming plate.

9. In a hook forming device, a rotatable forming plate, means on the face of the plate for gripping a rod end section, a reciprocating head movable toward and from the face of the plate, a worm nut carried by the head, a worm member carried by the nut and adapted to be brought into rotative engagement with the plate by the advancing movement of the head to thereby bend the rod section, spring means for maintaining the worm member in engagement. with the plate during the receding movement of the head to thereby reverse the rotation of the head. adjustable stop means carried by the worm and engaged by the nut near the end of the receding movement to withdraw the worm from engagement with the plate cut-ofi' means for the work, and an adjustable actuating member for the cut-oil means carried by the head for severing the stock at any desired point in the 'torming operation.

10. In a hook t'orniing device, a rotatable hook forming member, means for locating a rod in position to be acted upon by said member, a driving member l'OLll'JTOCtlblO in the direction of the axis ot rotation of the hook forming member, and connections for converting reci n'ocating movement of the driving member into rotary movement of the hook forming member.

11. In a hook forming device, a rotatable hook forming member, means for locating a rod in position to be acted upon by said member, a driving member reciprocable in the direction of the axis of rotation of: the hook forming member, connections for converting reciprocating movement into rotary movement ot the hook forming member and means for cutting the rod actuated by the driving member.

Signed at New York city this 16th day of January 1924;.

HUGO FUCHS. 

